Lock On is a genre of street art, where artists create installations by attaching sculptures to public furniture using lengths of chain and old bike locks.
[1] A Lock On is art in a public space, typically attached to a fence or street lamp with some sort of padlock, without permission.
The Lock On style is a "non-destructive" form of underground art.
[2][3] Lock On street sculptures can be made from various materials like wood, plastic, clay, concrete, iron, styrofoam or polystyrene.
The locks used when mounting street sculptures are, in some cases, dismounted from broken bikes, found nearby.